+typedef struct call_entry *call_entry_t;
+
+extern queue_t call_entry_enqueue_deadline(
+ call_entry_t entry,
+ queue_t queue,
+ uint64_t deadline);
+
+extern queue_t call_entry_enqueue_tail(
+ call_entry_t entry,
+ queue_t queue);
+
+extern queue_t call_entry_dequeue(
+ call_entry_t entry);
+